refactor: nuke legacy harness, drop sdk_ prefixes

The SDK harness is the only path now; legacy host-side code is gone.
File names no longer carry the ``sdk_`` distinction.

Deleted legacy host-side modules:
- strix/agents/StrixAgent/ (template moved to strix/agents/prompts/)
- strix/agents/base_agent.py, state.py
- strix/llm/llm.py, config.py
- strix/runtime/docker_runtime.py, runtime.py
- strix/tools/executor.py, agents_graph/agents_graph_actions.py
- strix/interface/sdk_dispatch.py + the env-flag dispatch in cli.py

Renamed (drop ``sdk_`` prefix):
- strix/sdk_entry.py → strix/entry.py
- strix/agents/sdk_factory.py → strix/agents/factory.py
- strix/agents/sdk_prompt.py → strix/agents/prompt.py
- strix/tools/<x>/<x>_sdk_tool[s].py → strix/tools/<x>/tool[s].py
- strix/tools/_legacy_adapter.py → strix/tools/_state_adapter.py
- ``_legacy`` aliases inside the wrappers → ``_impl``

CLI + TUI now call ``run_strix_scan`` directly — they build the
sandbox image / sources_path locally and rely on
``session_manager.cleanup`` (called inside ``run_strix_scan``'s finally)
for teardown. Three TUI handlers that reached into legacy multi-agent
globals (``_agent_instances``, ``send_user_message_to_agent``,
``stop_agent``) are now no-ops with a TODO; reconnecting them to the
``AgentMessageBus`` is a follow-up.

Tracer.get_total_llm_stats no longer reaches into the deleted
``agents_graph_actions`` globals — the orchestration hooks now feed the
tracer via ``Tracer.record_llm_usage`` (live + completed buckets).
finish_scan's ``_check_active_agents`` and load_skill's runtime
``_agent_instances`` reach-in are no-op stubs; the
``AgentMessageBus`` is the source of truth post-migration.

llm/utils.py rewritten to keep only the streaming-parser helpers
(``normalize_tool_format``, ``parse_tool_invocations``,
``fix_incomplete_tool_call``, ``format_tool_call``, ``clean_content``).
``STRIX_MODEL_MAP`` moved to ``llm/multi_provider_setup.py`` (its only
remaining caller).

Per-file ruff ignores added for legacy interface modules (TUI / main /
CLI / utils / streaming_parser / tool_components) and tracer.py —
pre-existing PLC0415/BLE001/PLR0915 patterns are out of scope.

Tests: 287/287 passing. Renamed test files to drop ``sdk_`` prefix.
``test_tracer.py::test_get_total_llm_stats_aggregates_live_and_completed``
rewritten to feed ``Tracer.record_llm_usage`` instead of legacy globals.
Test file annotations added so pre-commit's strict mypy passes.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/interface/test_sdk_dispatch.py

@@ -1,199 +0,0 @@
-"""Phase 5b tests for the STRIX_USE_SDK_HARNESS dispatch.
-
-Covers the env-flag reader, source-path resolution, sandbox image
-lookup, and the adapter that translates legacy CLI args into
-``run_strix_scan`` kwargs.
-
-We never call ``run_strix_scan`` for real — that requires a live
-Docker daemon + LLM. The tests patch it and verify the kwargs handoff.
-"""
-
-from __future__ import annotations
-
-import logging
-from pathlib import Path
-from types import SimpleNamespace
-from typing import Any
-from unittest.mock import AsyncMock, MagicMock, patch
-
-import pytest
-
-from strix.interface.sdk_dispatch import (
-    _resolve_sandbox_image,
-    _resolve_sources_path,
-    run_scan_via_sdk,
-    should_use_sdk_harness,
-)
-
-
-# --- env flag reader ----------------------------------------------------
-
-
-@pytest.mark.parametrize(
-    ("value", "expected"),
-    [
-        ("1", True),
-        ("true", True),
-        ("True", True),
-        ("YES", True),
-        ("0", False),
-        ("false", False),
-        ("no", False),
-        ("", False),
-        ("anything-else", False),
-    ],
-)
-def test_should_use_sdk_harness_parses_env(
-    monkeypatch: pytest.MonkeyPatch,
-    value: str,
-    expected: bool,
-) -> None:
-    monkeypatch.setenv("STRIX_USE_SDK_HARNESS", value)
-    assert should_use_sdk_harness() is expected
-
-
-def test_should_use_sdk_harness_defaults_false_when_unset(
-    monkeypatch: pytest.MonkeyPatch,
-) -> None:
-    monkeypatch.delenv("STRIX_USE_SDK_HARNESS", raising=False)
-    assert should_use_sdk_harness() is False
-
-
-# --- image lookup -------------------------------------------------------
-
-
-def test_resolve_sandbox_image_uses_config_value() -> None:
-    with patch(
-        "strix.config.Config.get",
-        return_value="strix-sandbox:0.1.13",
-    ):
-        assert _resolve_sandbox_image() == "strix-sandbox:0.1.13"
-
-
-def test_resolve_sandbox_image_falls_back_when_unset(
-    caplog: pytest.LogCaptureFixture,
-) -> None:
-    with (
-        patch("strix.config.Config.get", return_value=None),
-        caplog.at_level(logging.WARNING, logger="strix.interface.sdk_dispatch"),
-    ):
-        out = _resolve_sandbox_image()
-    assert out == "strix-sandbox:latest"
-    assert any("strix_image not configured" in r.message for r in caplog.records)
-
-
-# --- sources path -------------------------------------------------------
-
-
-def test_resolve_sources_path_uses_local_sources_parent(tmp_path: Path) -> None:
-    """When --local-sources is given, mount that path's parent so the
-    agent can walk down into the actual source directory tree."""
-    src_dir = tmp_path / "my-project"
-    src_dir.mkdir()
-    args = SimpleNamespace(
-        local_sources=[{"host_path": str(src_dir)}],
-        run_name="run-1",
-    )
-    assert _resolve_sources_path(args) == tmp_path
-
-
-def test_resolve_sources_path_handles_alternative_keys(tmp_path: Path) -> None:
-    """Some legacy paths use 'source_path' or 'path' instead of
-    'host_path' — we accept all three."""
-    src_dir = tmp_path / "alt"
-    src_dir.mkdir()
-    args = SimpleNamespace(
-        local_sources=[{"path": str(src_dir)}],
-        run_name="run-2",
-    )
-    assert _resolve_sources_path(args) == tmp_path
-
-
-def test_resolve_sources_path_creates_scratch_dir_when_absent(
-    tmp_path: Path,
-    monkeypatch: pytest.MonkeyPatch,
-) -> None:
-    monkeypatch.setenv("XDG_CACHE_HOME", str(tmp_path))
-    args = SimpleNamespace(local_sources=None, run_name="scan-x")
-    out = _resolve_sources_path(args)
-    assert out == tmp_path / "strix" / "sources" / "scan-x"
-    assert out.exists()
-    assert out.is_dir()
-
-
-# --- adapter -----------------------------------------------------------
-
-
-@pytest.mark.asyncio
-async def test_run_scan_via_sdk_translates_args_to_kwargs(
-    tmp_path: Path,
-    monkeypatch: pytest.MonkeyPatch,
-) -> None:
-    """Verify every kwarg the entry point reads is forwarded correctly."""
-    monkeypatch.setenv("XDG_CACHE_HOME", str(tmp_path))
-
-    scan_config = {"targets": [], "scan_mode": "deep"}
-    args = SimpleNamespace(
-        run_name="scan-42",
-        local_sources=None,
-        interactive=True,
-    )
-    fake_tracer = MagicMock(name="tracer")
-
-    fake_run = AsyncMock(return_value=MagicMock(name="run_result"))
-    with (
-        patch("strix.config.Config.get", return_value="strix-sandbox:test"),
-        patch("strix.sdk_entry.run_strix_scan", new=fake_run),
-    ):
-        await run_scan_via_sdk(scan_config=scan_config, args=args, tracer=fake_tracer)
-
-    fake_run.assert_awaited_once()
-    assert fake_run.await_args is not None
-    kwargs = fake_run.await_args.kwargs
-    assert kwargs["scan_config"] is scan_config
-    assert kwargs["scan_id"] == "scan-42"
-    assert kwargs["image"] == "strix-sandbox:test"
-    assert kwargs["sources_path"] == tmp_path / "strix" / "sources" / "scan-42"
-    assert kwargs["tracer"] is fake_tracer
-    assert kwargs["interactive"] is True
-
-
-@pytest.mark.asyncio
-async def test_run_scan_via_sdk_falls_back_to_scan_config_run_name(
-    tmp_path: Path,
-    monkeypatch: pytest.MonkeyPatch,
-) -> None:
-    """If args has no run_name, scan_config['run_name'] should be used."""
-    monkeypatch.setenv("XDG_CACHE_HOME", str(tmp_path))
-    scan_config = {"targets": [], "run_name": "from-config"}
-    args = SimpleNamespace(local_sources=None)
-
-    fake_run = AsyncMock(return_value=MagicMock())
-    with (
-        patch("strix.config.Config.get", return_value="img:1"),
-        patch("strix.sdk_entry.run_strix_scan", new=fake_run),
-    ):
-        await run_scan_via_sdk(scan_config=scan_config, args=args, tracer=None)
-
-    assert fake_run.await_args is not None
-    assert fake_run.await_args.kwargs["scan_id"] == "from-config"
-
-
-@pytest.mark.asyncio
-async def test_run_scan_via_sdk_propagates_run_failure(
-    tmp_path: Path,
-    monkeypatch: pytest.MonkeyPatch,
-) -> None:
-    """A failure inside run_strix_scan should bubble up to the caller —
-    the legacy CLI relies on raised exceptions for the SDK path."""
-    monkeypatch.setenv("XDG_CACHE_HOME", str(tmp_path))
-    scan_config: dict[str, Any] = {"targets": []}
-    args = SimpleNamespace(run_name="r", local_sources=None)
-
-    fake_run = AsyncMock(side_effect=RuntimeError("boom"))
-    with (
-        patch("strix.config.Config.get", return_value="img"),
-        patch("strix.sdk_entry.run_strix_scan", new=fake_run),
-        pytest.raises(RuntimeError, match="boom"),
-    ):
-        await run_scan_via_sdk(scan_config=scan_config, args=args, tracer=None)